@article{ZNSL_1979_88_a6,
     author = {V. A. Kriau\v{c}iukas},
     title = {A~diophantine representation of perfect numbers},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {78--89},
     publisher = {mathdoc},
     volume = {88},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_88_a6/}
}